#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

int main (int argc , char *argv[])
{
	if (argc !=2)
	{
		printf ("./a.out filename\n ");
		return -1;
	}
	int fd = open (argv[1],O_RDONLY|O_CREAT,0666);
	close (fd);
	return 0;
}
